Zig-zag sewing machine



Sept. 24, 1963 w. ENGEL ZIG-ZAG SEWING MACHINE 6 Sheets-Sheet 1 Filed Oct. 24, 1956 Inventor. h/az fgfi/m [44:4

Sebt. 24, 1963 w, ENGEL 3,104,638

ZIGZAG SEWING MACHINE Filed Oct. 24, 1956 6 sheetswsheet 2 a if p 24, 1963 w. ENGEL 3,104,638

ZIG-ZAG SEWING MACHINE Filed Oct. 24, 1956 6 Sheets-Sheet 5 w. ENGEL J ZIG-ZAG SEWING MACHINE Sept. 24, 1963- 6 Sheets-Sheet 4 Filed Oct. 24, 1956 Sept. 24, 1963 v w. ENGEL 3,104,638

ZIG-ZAG SEWING MACHINE Filed Oct. 24, 1956 6 Sheets-Sheet 5 Sept. 24, 1963 w. ENGEL ZIG-ZAG SEWING MACHINE 6 Sheets-Sheet 6 Filed Oct. 24, 1956 .70 van for: WW fQq/vg 01 454 YM I United States Patent 3,104,638 ZIG-ZAG SEWING MACHINE Wolfgang Engel, Bielefeld, Germany, assignor to Ankar- Phoenix Naemaschinen Aktiengesellschaft, Bielefeld,

Germany Filed Get. 24, 1956, Ser. No. 618,056 Claims priority, application Germany Oct. 25, 1955 18 Claims. (Cl. 112-158) The present invention relates to sewing machines; particularly to sewing machines of the type adapted by means of an oscillator bar which guides the needle bar, to effect zig-zag stitches for sewing different kinds of patterns. Sewing machines are known by means of which not only straight seams and zig-zag seams are produced but also, with the aid of guides or cams, fancy or decorative stitches and button holes or other closed sewing patterns. 7

It is an object of the present invention to produce button holes or other closed or open sewing patterns semiautomatically by means of zigzag sewing machines independently of the type of the guide assembly employed for effecting the lateral deflection of the needle, by the use of a connecting gearing which simultaneously sets the adjusting means for the magnitude of the lateral deflections of the needle, for the lateral position of the needle and for the magnitudeand direction of the feeding of the material. 7

It is a further object of the invention to provide for setting the machine, by a single knob manipulation, to sew button holes or the like, or to reset the machine from button hole sewing and the like to any desired sewing operation.

Other objects and advantages of the connecting gearing in accordance with the invention will become apparent when reference is had to the drawings which illustrate the subject of the invention in connection with two embodiments and where:

FIG. 1 is the front view of the machine arm shown in dot and dash lines with an interengaged connecting gearing mounted for operation outside the arm, in position of operation,

FIG. 2 is a front view similar to that of FIG. 1 with the interengaging connecting gearing mounted outside the arm in inoperative position,

FIG. 3 is a front view of a modified form of the invention showing the arm in dot and dash lines with a linked connecting gearing mounted for operation on the outside of the arm, in operative position,

FIGS. 4 and 5 are top views of button hole seams,

FIG. 6 is the cross-sectional view of a sewing machine showing the drive and the setting means for the lateral deflections of the needle and the advancing movements of the material feeding dog,

FIG. 7 is a composite view showing partly in section components illustrated primarily in FIGS. 1 and 6 and taken generally along the line VII-VII in FIG. 6 although differing therefrom somewhat as to proportions and minor details for the sake of clearness, and

FIG. 8 is a sectional view taken along line VIII-Vlll in FIG. 7.

In accordance with FIG. 6 the bevel gear 53 is mounted on the main drive shaft 52 which is journalled in the machine arm 2, driving the gear 54 which is journalled on a stud 55 which is secured to the rear wall of the housing. The stud 55 supports the triangular cam 56 which is engaged by the jaws of the bifurcated lever or cam follower 57. The bent end of the bifurcated lever or cam follower 57 is connected to the needle bar oscillator 59 by means of a pivot pin 58. The needle bar oscillator is pivotally mounted on the stud 60 which is mounted in the arm 2 and it reciprocably supports the needle bar 59' to which the needle is secured at the lower end. In the front wall of the arm 2 the bolt 6 (FIGS. 2, 3, 6, 7) or bolt 32' (FIG. 3) is rotatably mounted. The stitch locating lever 5 is mounted externally of the arm 2 on bolt 6 for adjusting the stitch location, and inside of the arm 2 the lever 66 is secured to the bolt 6 or 32', respectively.

At the end of lever 66 a slide member 63 having a groove 62 is rotatably mounted. In the front wall of the arm 2 a bolt 8 (FIGS. 2, 3, 6, 7) is also mounted for rotatable movement. A lever 7 is secured to bolt 8 externally of arm 2 for setting the stitch width and inside of the arm 2 a lever 65 is provided on the bolt 8 or 45, which lever is connected by a link 64 to the slide member 63. The bifurcated lever or cam followed 57 is moved to and fro about pivot point 58 by means of the three cornered cam 56. The guided element or pin 61 fastened to the bifurcated lever or cam follower 57 slides back and forth in the groove 62 of the slide member. Depending on the position of the stitch width lever 7 the position of the groove 62 is changed and thus the magnitude of the lateral deflection of the needle. Depending on the position of the stitch location lever 5 the setting of lever 66 is changed and thus the lateral position of the needle. A' cam 68 which is encompassed by the jaws of the cam lever 69 is provided upon the main drive shaft 52. The cam lever 69 is rotatably connected at its end by means of a pin 71 to the crank 72, the lever arm of which extends substantially horizontally. This crank 72 is secured to the advancing shaft 73 which is journalled in the base 76 of the sewing machine, by means of pointed pins 74 and 75. The advancing shaft 73 is provided with two arms, 77 and 78, extending essentially vertically, and at the upper end of these arms the horizontally disposed material advancing block 79 is mounted by means of a bolt 79 and the tooth head or dog 80 is secured to the block for engaging and advancing the material.

A slide member 84 is rotatably journalled in arm 2 and is provided with a groove 82 and a lever arm 83 extend ing substantially horizontally to the end of which the connecting bar 85 is attached. This connecting bar 85 is arranged at the lever 86 which is secured to a bolt 4 or 40 which is likewise journalled in the front wall of arm 2. A stitch length lever 3 is secured to this bolt 4- or 40 externally of the sewing machine arm 2. The cam 68 reeiprocates the cam lever 69 about pivot point 71 thus sliding pin 81 which is secured to the cam lever 69.back

and forth in the groove 82 of the slide. Adjusting stitch 5 length lever 3 sets the position of the slide groove 82 and thus the amount and direction of the advancement of the material.

FIG. 1 shows the adjusting lever 3 mounted upon stud 4 in the arm 2 for setting the magnitude and direction of the material advancement, the adjusting lever 5 for the lateral location of the needle mounted upon stud 6, and the setting lever 7 for the magnitude of the lateral de flections of the needle mounted upon stud 8. The adjusting lever 5 carries a pin 10 upon which the connecting bar 9 is journalled. The connecting 'bar 9 is provided at both ends with cams or curved conformations. An angular lever is provided upon stud 22 mounted on arm 2 presenting arms 26' as well as 21 and 25. A knob 20 is provided on lever arm 20'.

If the angular lever 26, 2'1, 25 is moved into the position shown in FIG. 1 by means :of knob 20, the lever arm 25' moves. the connecting bar 9 into horizontal position against the tension of spring 11 while lever arm 21' tensions the spider spring 24 which is mounted upon stud 4 and thus places the contact lever 19 resiliently against the right cam of the connecting bar 9. Simultaneously, the leaf spring 28 is tensioned by way of the bar 26 which engages lever arm Y25' and lever 27 which is jou-rnalled on stud 8, whereby the feeler lever 15 which is connected with adjusting lever 7 comes to rest resiliently against the left cam- 13 of the connecting bar 9. Thus the adjusting levers 3, 5 and 7 are placed in operative connection, and by operating the adjusting lever 5 it is possible to produce button holes in av manner described hereinafter.

Hand knob 23 is rotated to the right in order to move adjusting levers 3, 5 and '7 to inoperative position. As a result the springs 24 and 28 are released and the levers 3, 5 and 7 may be set independently of one another. The spring 11 withdraws the connecting bar 9' from the reach of feeler lever 15 as shown in FIG. 2.

When the adjusting levers 3, 5 and 7 are. in operative connection as shown in FIG. 1 due to moving the hand knob 29 to the left, the sewing of a button hole for shirts or the like is effected in the following manner:

Adjusting lever 5 is moved to the right. As a result the center of the needle is located towards the right. At the same time the feeler point or nose of lever 19 engages the cam surface 16 thus swinging the setting lever S to the right and causing the machine to sew backwards. The nose of lever 15 comes torest against the surface 12 whereby lever '7 is swung towards the right side and the transverse stitch magnitude is adjusted to the width of the edge.

Thus the sewing machine sews the right edge of the button hole in backward stitches starting at point 23 of FIG. 4. As soon as the desired length of the button hole has been sewed, the adjusting lever 5 is swung to the center position. Thus the needle is located in center position. The feeler point of the lever 19 is now located upon the surface 18 whereby setting lever 3 is swung to the left and the sewing machine sews forward stitches. The feeler point of lever 15 rests resiliently against the cam surface 13 moving setting lever 7 to the right and thus adjusting the magnitude and the lateral deflections of the needle to the width of the locking seam. Now the sewing machine sews forward stitches to complete the locking seam 25 on the button hole.

Upon completion of this seam the lever 5 is swung to the left, thus shifting the needle center to the left. At the same time the nose of the lever 1) slides along the cam 18 and the setting lever 3 retains its position, while the nose of the lever 15 comes to rest against the surface 14 thus moving the adjusting lever 7 to the left and again adjusting the magnitude of thelateral deflections of the needle to the width of the edge. Now the sewing machine sews the left edge 29 of the button hole with forward stitches. Shortly before the left edge of the button hole attains the length of the right edge the adjusting lever 5 is swung to the center position so that the needle assumes the central location. The nose of the lever 19 in this connection slides along the guide surface 18 so that the adjusting lever 3 retains its position, and the sewing of forward stitches continues while the nose of lever 15 engages the cam surface 13 thus swinging the setting lever 7 t0 the left so that the magnitude of the lateral deflections corresponds to the width of the locking seam. The

machine now sews the second locking seam St? in forward stitches. Upon completion of the second locking scam the machine is stopped manually and the button hole is complete.

The connecting bar 9 may also be provided on the adjusting lever 3 instead of on the lever 5. In that event the undergarment button hole is produced by operating the adjusting lever 3. The cams provided at the ends of the connecting bar 9 may be made interchangeable so that upon interchanging of the two cams fancy stitches may be made semi-automatically by means of the adjusting lever 5.

Instead of the loosely connected arrangement of the adjusting levers 3, 5 and '7, it is also possible to employ a firmly linked connection of the levers by way of the connecting bar as shown in FIG. 3.

The adjusting lever 3 for the magnitude and direction of the stitch is jouranlled upon the stud 4i? in sum 2 and is elongated above'this stud end upwardly and entries at its upper end the pin 36. The adjusting lever 5 for the of rotation 41, the end of lever arm 7' connecting to an eye of the link 46 while the other end of this link carries lever 44 which is fixedly mounted upon the adjusting shaft 45, the rotation of which causes the setting of the magnitude of the lateral deflections of the needle in the known manner. If the two lever arms 7' and 46 which are in the form of jointed levers are in the stretched out position the shaft 8 is shifted to the maximum extent toward the left. In this position the largest zig-zag stitch is obtained and the adjusting lever 7 is in the central position. The double lever is mounted upon the stud'35' in arm 2 and the manipulating knob 47 is provided at its upper lever end. If the double lever is shifted to the left by means of this knob to the illustrated vertical position, the lower lever arm of the double lever 35 swings the connecting bar or gear 31 against the effect of the spring 33 into horizontal position. The connecting bar 3 1 which is suitably made in the form of a leaf spring then engages 5 at its ends the pins 36 and 37. The adjusting levers 3' and 5 can be swung in .such a manner that the grooves 42 and 43 of the connecting'bar engage the pins 35 and may be sewn by operating the lever 5 or optionally also lever 3 or 7.

For example, if the adjusting lever 5 is set to the night the needle center is displaced to the right, the adjusting lever '3 is swung to the left, whereby the sewing machine sews backwardly and the adjusting lever 7 is swung to the right so that the jointed levers 7 and 46 which form a toggle lever are flexed downwardly and the lever 44 is swung to the right so that the magnitude of the lateral deflections is reduced to the width of the edge of the button hole. Now the sewing machine sews the right edge or bead of the button hole in backwards stitching starting at point 48 of FIG. 5. Upon reaching the desired button hole length, the adjusting lever 5 is moved to the center position. This places the needle to center position. The adjusting lever 3 is also placed intocenter position so that the stitch length becomes substantially zero and the setting lever 7 is shifted to the center position so that the knee joint 7 and 46 assumes the stretched position, and lever 44 is swung all the way to the left so that the lateral deflections of the needle are adjusted to the magnitude of the locking stitches. Now the machine sews the first lock 49 without advancing the material. By shifting the setting lever 5 to the left the lateral position of the needle is adjusted to the left, the adjusting lever 3 is moved to the right causing the machine to sew forward, the adjusting lever '7 is shifted to the left so that the joint lever 7' and 46 flexes upwardly while lever 44 swings to the right and the magnitude of the lateral needle deflections is reduced to the width of the edge.

The machine now sews the second edge or bead 50 in forward steps. Upon obtaining the first edge length the adjusting lever 5 is swung to the center position and the needle assumes the center position, the lever '3 is likewise changed over to the center position and thus the stitch length becomes substantially zero, while the adjusting lever 7 swings to center position so that the joint lever 7' and 46 is again brought into stretched position and lever 44 moves the maximum extent to the left, which causes 1 Thus the firm operative connection between levers 3, 5 and 7 is obtained and button holes for undergarments the magnitude of the lateral deflections of the needle to be increased to the locking width. The machine now sews the second locking stitches S1 of the button hole without advancing the material. Upon completing the locking seam the button hole seam is completed.

If it is now desired to change over to any other type of sewing, the knob 47 is moved to the right which causes the connecting bar 31 to be disengaged under the pressure of spring 33 while all adjusting levers are again adjustable independently of each other.

The construciton of the connecting bar in accordance with the invention can also be accommodated within the arm 2 of the sewing machine while the levers 3, 5 and 7 extend outwardly.

While the invention has been described with reference to the embodiments illustrated in the drawings, it is not limited thereto, but the scope of protection it is desired to cover by Letters Patent is set forth in the appended claims.

I claim:

1. In a zig-Zag sewing machine comprising a base having an advancing shaft mounted therein, a standard supported on said base and supporting a machine arm and a machine head at the end of said arm, a drive shaft mounted longitudinally in said arm, an oscillator cam and a feed cam connected to and driven by said drive shaft, an oscillator cam follower, a feed cam follower, a needle bar oscillator supported in said head having a needle bar in sliding engagement therewith, said oscillator being operatively connected for transverse movements by way of said oscillator cam follower to said oscillator cam, a material feeding dog disposed in said base below said needle bar operatively connected to said advancing shaft which is linked by way of said feed cam follower to said feed cam, oscillator guiding means including a first slide member and oscillator adjusting means including a first lever linked to said first slide member for guiding the lateral deflections of said needle bar oscillator and thereby controlling the stitch width, location adjusting means including a second lever connected to said first slide member for setting the central location of said needle bar oscillator by way of said first slide member and said oscillator cam follower, and step adjusting means connected to said feed cam follower including a second slide member and a setting lever for adjusting the magnitude and direction of the steps cfiected by said feeding dog, said first lever, said second lever and said setting lever being pivotally mounted in the housing of the machine on pivot pins having operating levers connected thereto and a connecting means consisting of a bar or the like extending between said oscillator adjusting means, said location adjusting means and said step adjusting means and being operatively linked by way of said first, said second and said setting lever to the respective pivot pin of each said adjusting means thereby causing simultaneous operation of said oscillator adjusting means, said location adjusting means and said step adjusting means in response to the operation of one of said levers.

2. In a zig-zag sewing machine comprising a base having an advancing shaft mounted therein, a standard supported on said base and supporting a machine arm and a machine head at the end of said arm, a drive shaft mounted longitudinally in said arm, an oscillator cam and a feed cam connected to and driven by said drive shaft, an oscillator cam follower, a feed cam follower, a needle bar oscillator supported in said head having a needle bar in sliding engagement therewith, said oscillator being operatively connected for transverse movements by way of said oscillator cam follower to said oscillator cam, a material feeding dog disposed in said base below said needle bar operatively connected to said advancing shaft which is linked by way of said feed cam follower to said feed cam, oscillator guiding means including a first slide member and oscillator adjusting means including a first lever linked to said first slide member for guiding the lateral deflections of said needle bar oscillator and thereby controlling the stitch width, location adjusting means including a second lever connected to said first slide member for setting the central location of said needle bar oscillator by way of said first slide member and said oscillator cam follower, and step adjusting means connected to said feed cam follower including a second slide member and a setting lever for adjusting the magnitude and direction ofthe steps efiected by said feeding dog, said first lever, said second lever and said set-ting lever being pivotally mounted in the housing of the machine on pivot pins having operating levers connected thereto and a connecting means including a bar or the like extending between said oscillator adjusting means, said location adjusting means and said step adjusting means and being operatively linked by way of said first, said second and said setting lever to the respective pivot pin of each said adjusting means thereby causing simultaneous operation of said oscillator adjusting means, said location adjusting means and said step adjusting means in response to the operation of one of said levers, and means including a knob or the like provided externally of the sewing machine and a lever member connected to said knob movable into operative engagement with said connecting means for moving said connecting means into position of operation and thereby interconnecting the adjusting means.

3. In a zig-zag sewing machine comprising a base having an advancing shaft mounted therein, a standard supported on said base and supporting a machine arm and a machine head at the end of said arm, a drive shaft mounted longitudinally in said arm, an oscillator cam and a feed cam connected to and driven by said drive shaft, an oscillator cam follower, a feed cam follower, a needlebar oscillator supported in said head having a needle bar in sliding engagement therewith, said oscillator being operatively connected for transverse movements by way of said oscillator cam follower to said oscillator cam, a material feeding dog disposed in said base below said needle bar operatively connected to said advancing shaft which is linked by way of said feed cam follower to said feed cam, oscillator guiding means including a first slide member and oscillator adjusting means including a first lever linked to said first slide member for guiding the lateral deflections of said needle bar oscillator and thereby controlling the stitch width, location adjusting means including a second lever connected to said first slide member for setting the central location of said needle bar oscillator by way of said first member and said oscillator cam follower, and step adjusting means connected to said feed cam follower including a second slide member and a setting lever for adjusting the magnitude and direction of the steps effected by said feeding dog, said first lever, said second lever and said setting lever being pivotally mounted in the housing of the machine on pivot pins having operating levers connected thereto and a connecting means including a bar or the like extending between said oscillator adjusting means, said location adjusting means and said step adjust-ing means and being operatively linked by Way of said first, said second and said setting lever to the respective pivot pin of each said adjusting means thereby causing simultaneous operation of said oscillator adjusting means, said location adjusting means and said step adjusting means in response to the operation of one of said levers, said oscillator adjusting means including a toggle lever extending between said first lever and said first slide member which in stretched condition provides for maximum stitch width.

4. In a zig-zag sewing machine comprising a base having an advancing shaft mounted therein, a standard supported on said base and supporting a machine arm and a machine hea d at the end of said arm, a drive shaft mounted longitudinally in said arm, .an oscillator cam and a feed cam connected to and driven by said drive shaft, an oscillator cam follower, a feed am follower; a needle bar oscillator supported in said head having .a needle bar in sliding engagement therewith, said oscillator being operatively connected for transverse movements by way of said oscillator cam follower to said oscillator cam, a material feeding dog disposed in said base below said needle bar operatively connected to said advancing shaft which is linked by way of said feed cam follower to said feed cam, oscillator guiding means including a first slide member and oscillator adjusting means including a first lever linked to said first slide member for guiding the lateral deflections of said needle bar cscillat-or and thereby controlling the stitch width, location adjusting means including a second lever connected to said first slide member for setting the central location of said needle bar oscillator by way of said first slide member and said oscillator cam follower, and step adjusting means connected to said feed cam follower including a second slide member and a setting lever for adjusting the magnitude and direction of the steps effected by said feeding dog, said first lever, said second lever and said setting lever being pivotally mounted in the housing of the machine on pivot pins having operating levers connected thereto and a connecting means including a bar or the like extending between said oscillator adjusting means, said location adjusting means and said step adjusting means and being operatively linked by way of said first, said second and said setting lever to the respective pivot pin of each said adjusting means thereby causing simultaneous operation of said oscillator adjusting means, said location adjusting means and said step adjusting means in response to the operation of one of said levers, and means including a knob or the like provided externally of the sewing machine in operative engagement with said connecting means for moving said connecting means and the adjusting means engaged thereby, and said oscillator adjusting means including a toggle lever extending between said first lever and said first slide member which in stretched condition provides for maximum stitch width.

5. In a zig-zag sewing machine comprising a base having an advancing shaft mounted therein, a standard supported on said base and supporting a machine arm and a machine head at the end of said arm, a drive shaft mounted longitudinally in said arm, an oscillator cam and a feed cam connected to and driven by said drive shaft, an oscillator cam follower, a feed cam follower, a needle bar oscillator supported in said head having a needle bar in sliding engagement therewith, said oscillator being operatively connected for transverse movements by way of said oscillator cam follower to said oscillator cam, a material feeding dog disposed in said base below said needle bar operatively connected to said advancing shaft which is linked by way of said feed cam follower to said feed cam, oscillator guiding means including a first slide member and oscillator adjusting means including a first lever linked to said first slide member for guiding the lateral deflections of said needle bar oscillator and thereby controlling the stitch width, location adjusting means including a second lever connected to said first slide member for setting the central location of said eedle bar oscillator by way of said first slide member and said oscillator cam follower, and step adjusting means connected to said feed cam follower including a second slide member and a setting lever for adjusting the mag nitude and direction of the steps effected by said feeding dog, said first lever, said second lever and said setting lever being pivotally mounted in the housing of the machine on pivot pins having operating levers connected thereto and a connecting means consisting of a bar or the like extending between said oscillator adjusting means, said location adjusting means and said step adjusting means and being operatively linked by way of said first, said second and said setting lever to the respective pivot pin of each said adjusting means thereby causing simul taneous operation of said oscillator adjusting means, said location adjusting means and said stepadjusting means in response to the operation of one of said levers, said connecting means including cam means adapted for operative engagement with members of said oscillator guiding and adjusting means and said step adjusting means.

6. In a zig-zag sewing machine comprising a base having an advancing shaft mounted therein, a standard supported on said base and supporting a machine arm and a machine head at the end of said arm, a drive shaft mounted longitudinally in said arm, an oscillator cam and a feed cam connected to and driven by said drive shaft, an oscillator cam follower, a feed cam follower,- a needle bar oscillator supported in said head having a needle bar in sliding engagement therewith, said oscillator being operatively connected for transverse movements by way of said oscillator cam follower to said oscillator cam, a material feeding dog disposed in said base below said needle bar operatively connected to said advancing shaft which is linked by way of said feed 0am follower to said feed cam, oscillator guiding means including a first slide member and oscillator adjusting means including a first lever linked to said first slide member for guiding the lateral deflections of said needle bar oscillator and thereby controlling the stitch width, location ad: justing means including a second lever connected to said' first slide member for setting the central location of said needle bar oscillator by way of said first slide member and said oscillator cam follower, and step adjusting means connected to said feed cam follower including-a second slide member and a setting lever for adjusting the magnitude and direction of the steps effected by said feeding dog, said first lever, said second lever and said setting lever being pivotallyrmounted in the housing of the machine on pivot pins having operating levers connected thereto and a connecting means including a bar or the like extending between said oscillator adjusting means, said location adjusting means and said step ad j'usting means and being operatively linked by way of said first, said second and said setting lever to the respective pivot pin of each said adjusting means thereby causv ing simultaneous operation of said oscillator adjusting means, said location adjusting means and said step a d-7' justing means in response to the operation of one of said levers, and means including a knob or the like provided externally of the sewing machine and a lever member connected to said knob movable into operative engagement with said connecting means for moving said con-i necting means into position of operation and thereby interconnecting the adjusting means, said connecting means including cam means adapted to operatively engage members of said oscillator guiding and adjusting means and said step adjusting means.

7. A sewing machine having a housing including a machine arm, a head supported on said arm and a drive shaft in said arm, a zi-g-zag mechanism including a needle bar mounted in an oscillator bar pivotally mounted in the head of the machine, an oscillator cam on said drive shaft, a cam followerconnec-ting said'oscillator bar to said oscillator cam, mechanism in the machine arm provided with a first slide member connected to said cam follower, said mechanism including first and second manfeed shaft, feed dog adjusting means including a second slide member, said second slide member being connected to said follower lever and third manually operable means including an adjusting member connected to said second slide member for changing the movements of said feed dog by way of said second slide member and manually operaenoaees tive interconnecting means consisting of a bar or the like operatively linked to a member of each said first, second and third manually operable means for manual simultaneous operation of said means to adjust the magnitude of the oscillations, the center position of the needle bar and the movements of said feed dog.

8. A sewin machine having a housing including a machine arm, a head supported on said arm and a drive shaft in said arm, .a zig-zag mechanism including a needle bar mounted in an oscillator bar pivotally mounted in the head of the machine, an oscillator cam on said drive shaft, a cam follower connecting said oscillator bar to said oscillator cam, a guided element on said cam follower, mechanism in the machine arm including a first slide member in engagement with said guided element, first 'and second manually operable means pivotally mounted in the housing of the machine and openatively linked to said first slide member and movable, respectively, to adjust the lateral deflections of the needle bar and to shift the center position of the needle bar, a feed shaft, a feed dog disposed below said needle bar connected to said feed shaft, a feed cam on said drive shaft, a follower lever connected to said feed cam and linked to said feed shaft, feed dog adjusting means including a second slide member, said second slide member being connected to said follower lever and third manually operable means including an adjusting member connected to said second slide member for changing the movements of said feed dog by way of said second slide member, and common operating means extending between said first, second and third manually operable means, one of said manually operable means being movable with its operating member to move said common operating means and to effect simultaneous movement of the other said operable means, said zig-zag mechanism in the actuated condition of said common operating means being operative to elfect the sewing of button holes under control of said one of said manually operable means.

9. A sewing machine having a housing including a machine arm, a head supported on said arm and a drive shaft in said arm, a Zig-zag mechanism including a needle bar mounted in an oscillator bar pivotally mounted in the head of the machine, an oscillator cam on said drive shaft, a cam follower connecting said oscillator bar to said oscillator cam, a guided element on said cam follower, mechanism in the machine arm including a first slide member in engagement with said guided element, first and second manually operable means pivotally mounted in the housing of the machine and operatively linked to said slide member and movable, respectively, to adjust the lateral deflections of the needle bar and to shift the center position of the needle bar, a feed shaft, a feed dog disposed below said needle bar connected to said feed shaft, a feed cam on said drive shaft, a follower lever connected to said feed cam and linked to said feed shaft, feed dog adjusting means including a second slide member, said second slide member being connected to said follower lever and third manually operable means including an adjusting member connected to said second slide member for changing the movements of said feed dog by way of said second slide member, and a common operating member extending between said manually operable means and having an actuated member for each said first, second and third manually operable means and each said manually operable means having an operating member in force transfer relation to its corresponding actuated member on said common operating member, and one of said manually operable means being movable with its operating member and its corresponding actuated member to effect simultaneous movement of the other said operable means by way of the actuated members associated therewith and of the mechanism associated with the other said operating members, said Zig-Zag mechanism in the actuated condition of said common operating member being operative to effect the sewing of button holes under control of said one of said manually operable means, said one said manually operable means being said second manually operable means.

10. A sewing machine having a housing including a machine arm, a head supported on said arm and a drive shaft in said arm, a zig-zag mechanism including a needle bar mounted in an oscillator bar pivotally mounted in the head of the machine, an oscillator cam on said drive shaft, a cam follower connecting said oscillator bar to said oscillator cam, a guided element on said cam follower, mechanism in the machine arm including a first slide member in engagement with said guided element, first and second manually operable means pivotally mounted in the housing of the machine and operatively linked to said first slide member and movable, respectively, to adjust the lateral deflections of the needle bar and to shift the center position of the needle bar, a feed shaft, a feed dog disposed below said needle bar connected to said feed shaft, a feed cam on said drive shaft, a follower lever connected to said feed cam and linked to said feed shaft, feed dog adjusting means including a second slide member, said second slide member being connected to said follower lever and third manually operable means including an adjusting member connected to said second slide member for changing the movements of said feed dog by way of said second slide member,

each said first, second and third manually operable means including an operating member, and a common operating member extending between said first, second and third manually operable means and having an actuated member for each said first, second and third manually operable means, one of said manually operable means being movable with its operating member to move said common operating member and to effect simultaneous movement of the other said operable means by way of the actuated members associated therewith and of the mechanism associated with the other said operating members, said common operating member being operatively associated with a fourth manually operable means operative to move said manually operable means together to a position to effect the sewing of button holes.

References Cited in the file of this patent UNITED STATES PATENTS 1,611,372 Rader Dec. 21, 1926 2,623,487 'Marasco Dec. 30, 1952 2,653,557 Casas-Robert et a1. Sept. 29, 1953 2,755,754 Urscheler July 24, 1956 2,905,119 Bono Sept. 22, 1959 3,033,138 Bono May 8, 1962 FOREIGN PATENTS 5,224 Great Britain of 1894 524,634 Italy Apr. 28, 1955 

1. IN A ZIG-ZAG SEWING MACHINE COMPRISING A BASE HAVING AN ADVANCING SHAFT MOUNTED THEREIN, A STANDARD SUPPORTED ON SAID BASE AND SUPPORTING A MACHINE ARM AND A MACHINE HEAD AT THE END OF SAID ARM, A DRIVE SHAFT MOUNTED LONGITUDINALLY IN SAID ARM, AN OSCILLATOR CAM AND A FEED CAM CONNECTED TO AND DRIVEN BY SAID DRIVE SHAFT, AN OSCILLATOR CAM FOLLOWER, A FEED CAM FOLLOWER, A NEEDLE BAR OSCILLATOR SUPPORTED IN SAID HEAD HAVING A NEEDLE BAR IN SLIDING ENGAGEMENT THEREWITH, SAID OSCILLATOR BEING OPERATIVELY CONNECTED FOR TRANSVERSE MOVEMENTS BY WAY OF SAID OSCILLATOR CAM FOLLOWER TO SAID OSCILLATOR CAM, A MATERIAL FEEDING DOG DISPOSED IN SAID BASE BELOW SAID NEEDLE BAR OPERATIVELY CONNECTED TO SAID ADVANCING SHAFT WHICH IS LINKED BY WAY OF SAID FEED CAM FOLLOWER TO SAID FEED CAM, OSCILLATOR GUIDING MEANS INCLUDING A FIRST SLIDE MEMBER AND OSCILLATOR ADJUSTING MEANS INCLUDING A FIRST LEVER LINKED TO SAID FIRST SLIDE MEMBER FOR GUIDING THE LATERAL DEFLECTIONS OF SAID NEEDLE BAR OSCILLATOR AND THEREBY CONTROLLING THE STITCH WIDTH, LOCATION ADJUSTING MEANS INCLUDING A SECOND LEVER CONNECTED TO SAID FIRST SLIDE MEMBER FOR SETTING THE CENTRAL LOCATION OF SAID NEEDLE BAR OSCILLATOR BY WAY OF SAID FIRST SLIDE MEMBER AND SAID OSCILLATOR CAM FOLLOWER, AND STEP ADJUSTING MEANS CONNECTED TO SAID FEED CAM FOLLOWER INCLUDING A SECOND SLIDE MEMBER AND A SETTING LEVER FOR ADJUSTING THE MAGNITUDE AND DIRECTION OF THE STEPS EFFECTED BY SAID FEEDING DOG, SAID FIRST LEVER, SAID SECOND LEVER AND SAID SETTING LEVER BEING PIVOTALLY MOUNTED IN THE HOUSING OF THE MACHINE ON PIVOT PINS HAVING OPERATING LEVERS CONNECTED THERETO AND A CONNECTING MEANS CONSISTING OF A BAR OR THE LIKE EXTENDING BETWEEN SAID OSCILLATOR ADJUSTING MEANS, SAID LOCATION ADJUSTING MEANS AND SAID STEP ADJUSTING MEANS AND BEING OPERATIVELY LINKED BY WAY OF SAID FIRST, SAID SECOND AND SAID SETTING LEVER TO THE RESPECTIVE PIVOT PIN OF EACH SAID ADJUSTING MEANS THEREBY CAUSING SIMULTANEOUS OPERATION OF SAID OSCILLATOR ADJUSTING MEANS, SAID LOCATION ADJUSTING MEANS AND SAID STEP ADJUSTING MEANS IN RESPONSE TO THE OPERATION OF ONE OF SAID LEVERS. 